{
  "id": 73081,
  "title": "What does 'merchant_id' means?",
  "url": "/competitions/elo-merchant-category-recommendation/discussion/73081",
  "author_name": "",
  "post_date": "2018-11-29T15:35:46.035211100Z",
  "votes": 6,
  "comment_count": 4,
  "views": 0,
  "content": "<p>I've checked 'new_merchant_transactions.csv'. \nI found that the same card_id never visits the same merchant_id again.</p>\n\n<p>For example, 'C_ID_b7ebee6539' has 109 transactions, but ALL visits(=merchant_id) are different.</p>\n\n<p>I assumed that the merchant_id is like a shop id, but it was different.\nDo you have any idea?</p>",
  "messages": [
    {
      "id": "429954",
      "postDate": "11/29/2018 15:35:46",
      "content": "<p>I've checked 'new_merchant_transactions.csv'. \nI found that the same card_id never visits the same merchant_id again.</p>\n\n<p>For example, 'C_ID_b7ebee6539' has 109 transactions, but ALL visits(=merchant_id) are different.</p>\n\n<p>I assumed that the merchant_id is like a shop id, but it was different.\nDo you have any idea?</p>",
      "rawMarkdown": "I've checked 'new\\_merchant\\_transactions.csv'. \nI found that the same card\\_id never visits the same merchant_id again.\n\nFor example, 'C\\_ID\\_b7ebee6539' has 109 transactions, but ALL visits(=merchant\\_id) are different.\n\nI assumed that the merchant\\_id is like a shop id, but it was different.\nDo you have any idea?",
      "votes": null
    },
    {
      "id": "430014",
      "postDate": "11/29/2018 16:54:01",
      "content": "<p>I think it's ID of the commercial account holder (merchant account) who sells something. By this identifier, he is registered, tracks transactions or refers to him when he requests to the bank. <br>\nIf we look on the \"new_merchant_transactions.csv\",  we see unique values: Card ID: 290001 ,  Merchant ID: 226130.\nIn theory, the number of sellers should be much less than buyers, but each company can have several legal entities.</p>",
      "rawMarkdown": "I think it's ID of the commercial account holder (merchant account) who sells something. By this identifier, he is registered, tracks transactions or refers to him when he requests to the bank.  \nIf we look on the \"new_merchant_transactions.csv\",  we see unique values: Card ID: 290001 ,  Merchant ID: 226130.\nIn theory, the number of sellers should be much less than buyers, but each company can have several legal entities.",
      "votes": null
    },
    {
      "id": "430314",
      "postDate": "11/30/2018 07:11:34",
      "content": "<p>Thank you for reply, Dmitrii.</p>\n\n<p>I agree your opinion that 'merchant_id' is the ID of the commercial account holder.\nBut I feel unnatural that the same card_id never visits the same merchant_id again.\n(Because I often visit the same super market and shop with the same credit card! )\nSo, i feel natural that the same card_id have at least 2 or 3 transactions with the same merchant_id.</p>\n\n<p>How do you feel it?</p>",
      "rawMarkdown": "Thank you for reply, Dmitrii.\n\nI agree your opinion that 'merchant\\_id' is the ID of the commercial account holder.\nBut I feel unnatural that the same card\\_id never visits the same merchant\\_id again.\n(Because I often visit the same super market and shop with the same credit card! )\nSo, i feel natural that the same card\\_id have at least 2 or 3 transactions with the same merchant\\_id.\n\nHow do you feel it?",
      "votes": null
    },
    {
      "id": "431076",
      "postDate": "12/01/2018 15:44:01",
      "content": "<p>I checked it on some card_id and merch_id. No one match. Each payment terminal in a supermarket has its own ID, and maybe a client got to different terminal each time (but 109 time?). It's realy strange. Perchaps, this is a good question for the \"Welcom to Elo competition!\" discussion.</p>",
      "rawMarkdown": "I checked it on some card_id and merch_id. No one match. Each payment terminal in a supermarket has its own ID, and maybe a client got to different terminal each time (but 109 time?). It's realy strange. Perchaps, this is a good question for the \"Welcom to Elo competition!\" discussion.",
      "votes": null
    },
    {
      "id": "431961",
      "postDate": "12/03/2018 07:00:39",
      "content": "<p>I checked 'historical_transactions.csv'.\nI found that the same card_id have many transactions with the same merchant_id in 'historical_transactions.csv'.\nThis means that 'new_merchant_transactions.csv' is the special file.\nI also found that the similar content is discussed in the following discussion and kernel.(But there is no conclusion yet..)</p>\n\n<p><a href=\"https://www.kaggle.com/c/elo-merchant-category-recommendation/discussion/72974\">https://www.kaggle.com/c/elo-merchant-category-recommendation/discussion/72974</a></p>\n\n<p><a href=\"https://www.kaggle.com/md123316852/exploring-card-id-vs-merchant-id-vs-target/notebook\">https://www.kaggle.com/md123316852/exploring-card-id-vs-merchant-id-vs-target/notebook</a></p>",
      "rawMarkdown": "I checked 'historical\\_transactions.csv'.\nI found that the same card\\_id have many transactions with the same merchant\\_id in 'historical\\_transactions.csv'.\nThis means that 'new\\_merchant\\_transactions.csv' is the special file.\nI also found that the similar content is discussed in the following discussion and kernel.(But there is no conclusion yet..)\n\nhttps://www.kaggle.com/c/elo-merchant-category-recommendation/discussion/72974\n\nhttps://www.kaggle.com/md123316852/exploring-card-id-vs-merchant-id-vs-target/notebook",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 430014,
      "author_name": "hedgehoginfog",
      "author_url": "",
      "post_date": "11/29/2018 16:54:01",
      "content": "<p>I think it's ID of the commercial account holder (merchant account) who sells something. By this identifier, he is registered, tracks transactions or refers to him when he requests to the bank. <br>\nIf we look on the \"new_merchant_transactions.csv\",  we see unique values: Card ID: 290001 ,  Merchant ID: 226130.\nIn theory, the number of sellers should be much less than buyers, but each company can have several legal entities.</p>",
      "votes": null,
      "replies": [
        {
          "id": 430314,
          "author_name": "yoshimitsuyagi",
          "author_url": "",
          "post_date": "11/30/2018 07:11:34",
          "content": "<p>Thank you for reply, Dmitrii.</p>\n\n<p>I agree your opinion that 'merchant_id' is the ID of the commercial account holder.\nBut I feel unnatural that the same card_id never visits the same merchant_id again.\n(Because I often visit the same super market and shop with the same credit card! )\nSo, i feel natural that the same card_id have at least 2 or 3 transactions with the same merchant_id.</p>\n\n<p>How do you feel it?</p>",
          "votes": null,
          "replies": []
        },
        {
          "id": 431076,
          "author_name": "hedgehoginfog",
          "author_url": "",
          "post_date": "12/01/2018 15:44:01",
          "content": "<p>I checked it on some card_id and merch_id. No one match. Each payment terminal in a supermarket has its own ID, and maybe a client got to different terminal each time (but 109 time?). It's realy strange. Perchaps, this is a good question for the \"Welcom to Elo competition!\" discussion.</p>",
          "votes": null,
          "replies": []
        },
        {
          "id": 431961,
          "author_name": "yoshimitsuyagi",
          "author_url": "",
          "post_date": "12/03/2018 07:00:39",
          "content": "<p>I checked 'historical_transactions.csv'.\nI found that the same card_id have many transactions with the same merchant_id in 'historical_transactions.csv'.\nThis means that 'new_merchant_transactions.csv' is the special file.\nI also found that the similar content is discussed in the following discussion and kernel.(But there is no conclusion yet..)</p>\n\n<p><a href=\"https://www.kaggle.com/c/elo-merchant-category-recommendation/discussion/72974\">https://www.kaggle.com/c/elo-merchant-category-recommendation/discussion/72974</a></p>\n\n<p><a href=\"https://www.kaggle.com/md123316852/exploring-card-id-vs-merchant-id-vs-target/notebook\">https://www.kaggle.com/md123316852/exploring-card-id-vs-merchant-id-vs-target/notebook</a></p>",
          "votes": null,
          "replies": []
        }
      ]
    }
  ],
  "raw_markdown_by_id": {
    "429954": "I've checked 'new\\_merchant\\_transactions.csv'. \nI found that the same card\\_id never visits the same merchant_id again.\n\nFor example, 'C\\_ID\\_b7ebee6539' has 109 transactions, but ALL visits(=merchant\\_id) are different.\n\nI assumed that the merchant\\_id is like a shop id, but it was different.\nDo you have any idea?",
    "430014": "I think it's ID of the commercial account holder (merchant account) who sells something. By this identifier, he is registered, tracks transactions or refers to him when he requests to the bank.  \nIf we look on the \"new_merchant_transactions.csv\",  we see unique values: Card ID: 290001 ,  Merchant ID: 226130.\nIn theory, the number of sellers should be much less than buyers, but each company can have several legal entities.",
    "430314": "Thank you for reply, Dmitrii.\n\nI agree your opinion that 'merchant\\_id' is the ID of the commercial account holder.\nBut I feel unnatural that the same card\\_id never visits the same merchant\\_id again.\n(Because I often visit the same super market and shop with the same credit card! )\nSo, i feel natural that the same card\\_id have at least 2 or 3 transactions with the same merchant\\_id.\n\nHow do you feel it?",
    "431076": "I checked it on some card_id and merch_id. No one match. Each payment terminal in a supermarket has its own ID, and maybe a client got to different terminal each time (but 109 time?). It's realy strange. Perchaps, this is a good question for the \"Welcom to Elo competition!\" discussion.",
    "431961": "I checked 'historical\\_transactions.csv'.\nI found that the same card\\_id have many transactions with the same merchant\\_id in 'historical\\_transactions.csv'.\nThis means that 'new\\_merchant\\_transactions.csv' is the special file.\nI also found that the similar content is discussed in the following discussion and kernel.(But there is no conclusion yet..)\n\nhttps://www.kaggle.com/c/elo-merchant-category-recommendation/discussion/72974\n\nhttps://www.kaggle.com/md123316852/exploring-card-id-vs-merchant-id-vs-target/notebook"
  },
  "source": "meta"
}